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The slavery of weight, which chains us to this planet and to the ground, is far more serious than we appreciate, simply because we have always been "earthbound". But, sooner or later, it will be possible to...

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A machine can be built to do any accurately described job better than any man. The superiority of a man is that he can do an unexpected, undescribed, and emergency job... provided he hasn't been especially trained...

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Bannister was a rocket scientist. He started with the premise of testing man's reaction to space probes under actual conditions; but now he was just testing space probes—and man was a necessary evil to contend...